/*
 * Blog Stylesheet
 * Based on Anthony Hobday's Visual Design Rules
 * https://anthonyhobday.com/sideprojects/saferules/
 */

/* ============================================
   CSS CUSTOM PROPERTIES
   Using near-black/near-white instead of pure values
   Neutrals have subtle warm saturation (<5%)
   ============================================ */
:root {
  /* Colors - warm-tinted neutrals for cohesion */
  --color-bg: hsl(30, 4%, 96%);
  --color-bg-elevated: hsl(30, 5%, 100%);
  --color-text: hsl(30, 5%, 12%);
  --color-text-muted: hsl(30, 3%, 45%);
  --color-border: hsl(30, 4%, 82%);
  --color-accent: hsl(220, 60%, 50%);
  --color-accent-hover: hsl(220, 60%, 40%);

  /* Typography - minimum 16px body, limit to 2 typefaces */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;

  /* Spacing - mathematically related (multiples of 8) */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 1rem;     /* 16px */
  --space-md: 1.5rem;   /* 24px */
  --space-lg: 2rem;     /* 32px */
  --space-xl: 3rem;     /* 48px */
  --space-xxl: 4rem;    /* 64px */

  /* Container max-width for ~70 character line length */
  --content-width: 42rem;
  --container-width: 52rem;

  /* Shadows - blur = 2x distance */
  --shadow-sm: 0 2px 4px hsla(30, 5%, 12%, 0.06);
  --shadow-md: 0 4px 8px hsla(30, 5%, 12%, 0.08);

  /* Border radius - nested corners calculated */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* ============================================
   BASE STYLES
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 100%; /* 16px base */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6; /* Increased line-height for body text */
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* ============================================
   TYPOGRAPHY
   Letter spacing: reduce for larger text, increase for smaller
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25; /* Tighter line-height for headings */
  letter-spacing: -0.02em; /* Reduced for large text */
  margin: 0 0 var(--space-sm) 0;
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 var(--space-sm) 0;
  max-width: var(--content-width); /* ~70 characters */
}

small, .text-sm {
  font-size: 0.875rem;
  letter-spacing: 0.01em; /* Increased for smaller text */
  line-height: 1.5;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* ============================================
   LAYOUT
   Outer padding >= inner padding
   ============================================ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
}

/* ============================================
   HEADER
   High contrast for important navigation
   ============================================ */
.site-header {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-elevated);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-title:hover {
  color: var(--color-text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: var(--space-md);
}

.site-nav a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.site-nav a:hover {
  color: var(--color-text);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
main {
  padding: var(--space-xl) 0;
}

/* ============================================
   BLOG POST CARDS
   Container borders contrast with both container AND background
   12% brightness difference for dark, 7% for light
   ============================================ */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.post-card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.post-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.post-card__meta {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  letter-spacing: 0.01em;
}

.post-card__title {
  margin-bottom: var(--space-xs);
}

.post-card__title a {
  color: var(--color-text);
  text-decoration: none;
}

.post-card__title a:hover {
  color: var(--color-accent);
}

.post-card__excerpt {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.post-card__link {
  font-weight: 500;
}

/* ============================================
   TAG/CATEGORY PILLS
   Button padding: horizontal = 2x vertical
   ============================================ */
.tag {
  display: inline-block;
  padding: 0.25rem 0.5rem; /* 2:1 horizontal to vertical */
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
}

/* ============================================
   BLOG POST DETAIL
   ============================================ */
.post-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.post-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.post-header__title {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.post-header__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  font-weight: 400;
  font-family: var(--font-body);
}

/* Post content typography */
.post-content {
  font-size: 1.0625rem; /* Slightly larger for comfortable reading */
  line-height: 1.7;
}

.post-content p {
  margin-bottom: var(--space-md);
}

.post-content h2 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.post-content h3 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
}

.post-content ul,
.post-content ol {
  margin: 0 0 var(--space-md) var(--space-md);
  padding-left: var(--space-sm);
}

.post-content li {
  margin-bottom: var(--space-xs);
}

.post-content blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-sm) var(--space-md);
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-bg);
  font-style: italic;
  color: var(--color-text-muted);
}

.post-content code {
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-size: 0.9em;
  padding: 0.125rem 0.375rem;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
}

.post-content pre {
  margin: var(--space-md) 0;
  padding: var(--space-md);
  background-color: hsl(30, 5%, 12%);
  color: hsl(30, 4%, 92%);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.post-content pre code {
  padding: 0;
  background: none;
  color: inherit;
}

/* ============================================
   PAGE HEADER
   Shared intro block for collection pages
   (quotes, links) — title, purpose, tending meta
   ============================================ */
.page-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.page-header__title {
  margin-bottom: var(--space-xs);
}

.page-header__intro {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.page-header__meta {
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ============================================
   QUOTES PAGE
   Commonplace book — masonry columns handle
   varied quote lengths without ragged rows
   ============================================ */
.quotes-grid {
  columns: 2;
  column-gap: var(--space-lg);
}

.quote-card {
  break-inside: avoid;
  position: relative;
  margin: 0 0 var(--space-lg) 0;
  padding: var(--space-lg);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* Decorative mark sits behind the text, low contrast */
.quote-card::before {
  content: "\201C";
  position: absolute;
  top: 0.25rem;
  left: 0.75rem;
  font-family: var(--font-heading);
  font-size: 4rem;
  line-height: 1;
  color: var(--color-border);
  pointer-events: none;
}

.quote-card__text {
  position: relative;
  margin: 0 0 var(--space-sm) 0;
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.0625rem;
  line-height: 1.6;
}

.quote-card__text p {
  margin-bottom: var(--space-sm);
}

.quote-card__text p:last-child {
  margin-bottom: 0;
}

.quote-card__attribution {
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  color: var(--color-text-muted);
}

.quote-card__attribution::before {
  content: "\2014\00A0"; /* em dash + nbsp */
}

.quote-card__source {
  font-style: italic;
}

/* ============================================
   LINKS PAGE
   Link garden — category jump nav plus dense,
   scannable rows with muted domains
   ============================================ */
.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
}

.category-nav a {
  display: inline-block;
  padding: 0.25rem 0.5rem; /* 2:1 horizontal to vertical */
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.category-nav a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  text-decoration: none;
}

.links-section {
  margin-bottom: var(--space-xl);
  scroll-margin-top: var(--space-lg); /* breathing room on anchor jumps */
}

.links-section__title {
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.links-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.link-item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.link-item:last-child {
  border-bottom: none;
}

.link-item__title {
  font-weight: 500;
}

.link-item__domain {
  margin-left: var(--space-xs);
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
  color: var(--color-text-muted);
}

.link-item__note {
  margin: 0.25rem 0 0 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* ============================================
   FOOTER
   Low contrast for structural elements
   ============================================ */
.site-footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ============================================
   BUTTONS
   High contrast for important actions
   Horizontal padding = 2x vertical
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.625rem 1.25rem; /* 2:1 ratio */
  font-size: 0.9375rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
}

.btn-primary {
  background-color: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: white;
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
}

/* ============================================
   UTILITIES
   ============================================ */
.text-muted {
  color: var(--color-text-muted);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  :root {
    --space-lg: 1.5rem;
    --space-xl: 2rem;
  }

  h1, .post-header__title {
    font-size: 2rem;
  }

  .site-header .container {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .site-footer .container {
    flex-direction: column;
    text-align: center;
  }

  .quotes-grid {
    columns: 1;
  }
}